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1
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2Subjects: “...Paleontology Permian....”
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3
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4
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7by Olson, Everett C. (Everett Claire), 1910-1993Subjects: “...Paleontology Permian....”
Published 1962
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10Published 1983Subjects: “...Paleontology Ordovician....”
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12by Campbell, K. S. W. (Kenton Stewart Wall)Subjects: “...Paleontology Silurian....”
Published 1967
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15by Strimple, Harrell L. (Harrell Leroy), 1912-1983Subjects: “...Paleontology Pennsylvanian....”
Published 1960
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19by Hesse, Curtis Julian, 1905-1945Subjects: “...Paleontology Oklahoma Optima....”
Published 1936
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